Food mixer



FIG. 1 is overhead left front perspective view of a food mixer showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a front elevational view; and,

FIG. 6 is a rear elevational view. 

The ornamental design for a food mixer, as shown and described. 